Megadream 3D Pen Kids, 3D Printing Drawing Pen with 3 Color ABS 1.7mm Filament Material, US Power Adapter, LCD Temperature Display Screen for Arts Crafts Doodle- Yellow Real-time LED display with adjustable button design, conveniently control the temperature based on your needs Cooling windows design which controls the temperature under a rather safe range. Change the printing & filament withdrawing speed of your choice Kindly know: Cut off the power and withdraw your filaments when the printing work is done in case there might be any possible blocking hassle. Do not touch the nozzle when the 3D pen is working As a bonus, 3 pack of printing materials will be coming together with the package Brief Instructions: Plug in the cable and wait 3 seconds until a yellow light is coming up. Press the temperature up button. When reached the targeted point, you will see a constant green light and it is ready to go. Suggested working temperature range: 175-185